Chapter4reading

Chapter4Theworldofnumbers,Newlesson:ReadingNumbers:Everyoneslanguage,Pre-reading:WordRevisionGivethecorrectwordsaccordingtotheChinesemeanings.,分数,特别、尤其,由组成,小数,发明（n.),Doyouremember?,百分比,fraction,especially,decimal,invention,percentage,consistof,乘,multiply;times,bemadeupof,发明（v.),invent,时代、时期,Doyouremember?,times,除以,divide,强大的,准确的,accurate,powerful,珠子,bead,算盘,平方根,abacus,squareroot,奇数的,odd,减去,minus;subtract,至少,atleast,Doyouremember?,偶的数,even,发展(v.),develop,development,数字,figure,加,plus；add,底部,bottom,计算器,计算（n.),Doyouremember?,calculatingmachine,calculation,计算（用的）adj.,calculating,计算（v.),calculate,宣告、通告,announcement,伙伴,fellow,度；度数,degree,埃及人,几乎,印度人,Doyouremember?,核对,Egyptian,nearly,Indian,check,古代的,ancient,找零,change,小孩,kid,事故,accident,然儿；不过,however,代表,standfor,分别地,separately,交通,traffic,上升,rise,Doyouremember?,丝；线,wire,总的,total,系统,system,指导,instruction,Newlesson:ReadingNumbers:Everyoneslanguage,Pre-reading:WordRevisionGivethecorrectwordsaccordingtotheEnglishmeanings.,eg:k_:child,kid,1.a_:many,manyyearsago2.c_of:have/bemadeupof/include3.i_:makeforthefirsttime4.a_:withoutmistakes5.s_for:mean6.i_:morethanonecountry7.d_:becomebiggerorstronger8.c_:saynumbersoneafteranother9.b_:inthelowestplace10.f_:anumberbetween0and9,Givetheproperwordsaccordingtothemeanings:,ancient,consist,accurate,international,develop,count,invent,stand,bottom,figure,I.Listenandanswer,Reading,Howdidthepeoplecountnumbersinancienttimes?Whofirstinventedzero?Whatkindofcalculatingmachinecancalculatepercentages?,Theynearlyallcountedintens.,2.TheIndians.,3.Modernelectroniccalculators.,II.Lookandthink(page45),Reading,Howmanypartsinthetext?,Three,Part1Part2Part3,Paragraph1Paragraph2Paragraph35,Mainideasofeachpart,Reading,Part1,Inancienttimes,peoplewroteindifferentways,butcountedintens.,Mainideasofeachpart,Reading,Part2,Theinventionofthezerohelpedpeoplewritebignumbersandtocalculate.,Mainideasofeachpart,Reading,Part3,Descriptionsofthreecalculatingmachines.1.theancientabacus,puter.,2.Long,longago,peoplewrotenumbersinthesameway.,Everyoneknowsatmosttwolanguages.,F,atleast,manydifferentways,F,Reading:III.TrueorFalse,4.Theinventionofzerowasveryusefulandimportant.,3.TheIndiansfirstinventedthe1to9systemofnumbersandtheChineseinventedthezero.,F,T,5.Anabacusisafastandaccuratemoderncalculator.,F,old/ancient,T,6.Acomputercandoacalculationveryfast.,Howmanylanguagesdoyouknow?Everyoneknowsatleasttwohisorherownlanguageandtheinternationallanguageofnumbers.,ReadingIV.(Indetail)Numbers:Everyoneslanguage,（至少）,（他或她自己的语言）,（国际数字语言）,AncientnumbersInancienttimes,peoplewrotenumbersinmanydifferentways.However,theynearlyallcountedintens.,differentwaysofwritingthenumber6,（在古代）,（以很多不同的方式）,（以十为单位）,ZeroThesystemofnumberstodayconsistsofthenumbersfrom1to9and0(zero).TheIndiansfirstinventedanddevelopedthe1to9systemofnumbers.,（数字体系）,（invent.v.inventionn.inventorn.）,develop.v.developmentn.,（Indian.Indiann./adj.）,Theytheninventedthezero.Theinventionofthezerohelpedpeoplewritebignumbersandcalculatemoreeasily.Nowuseeachofthesetennumbersoncetowritethebiggestnumber.Whatisit?,（零的发明）,（更容易计算）,CalculatingmachinesOneofthefirstcalculatingmachineswasanabacus.Abacusesarefastandaccurate.,（快而精确）,（算盘）,（计算工具）,Ontheabacus,thebeadsonthewiresstandforones,tens,hundredsandthousands,startingfromthebottomwire.,（从底部的横杆开始）,Theabacusinthepictureshowsanumber.Writeitdowninfiguresandtheninwords.Multiplyitbyzeroandthenadd1.Whatistheanswer?,（以单词的形式）,（以数字的形式）,Modernelectroniccalculatorscanadd,subtract,multiplyanddivide.Itcanalsocalculatepercentagesandsquareroots.,（平方根）,（calculatorn.calculatev.calculationn.calculatingadj.）,（现代电子计算器）,Computersareverypowerfulcalculatingmachines.Acomputercandoacalculationinaflash.,（做计算）,（一瞬间）,ReadingV.Keyphrases,1至少2他或她自己的语言3国际语言4原始的数字,atleast,hisorherownlanguage,internationallanguage,ancientnumbers,5在古代,6以很多不同的方式,7以十进位,inancienttimes,inmanydifferentways,countintens,8数字体系,9由组成,10零的发明,11计算更简单,thesystemofnumbers,consistof,theinventionofthezero,calculatemoreeasily,12每一,13最大的数字,14其中之一,15又快又准,eachof,thebiggestnumber,oneof,fastandaccurate,18底部的线,16表示，代表,17从开始,20以单词的形式,19以数字的形式,standfor,startfrom,thebottomwire,infigures,inwords,22平方根,21现代电子计算器,23做一次计算,24一瞬间,modernelectroniccalculators,squareroot,doacalculation,inaflash,Peoplestartedtousenumbersalongt_agobuttheywrotetheminmanyd_ways.,Reading:Rewritethetext,time,different,TheI_firsti_thesystemofnumbersfrom1to9,andthenthez_.Thezerowasveryusefulbecauseithelpedpeoplewriteb_numbersandcalculatemoree_.,Indians,invented,zero,big,easily,Thea_wasoneofthefirstcalculatingmachines.Itisf_anda_,sowestilluseittoday.,abacus,fast,accurate,Todaywehavemanyotherkindsofm_calculators,likecomputers.Theyareveryp_andcandoacalculationinaf_.,modern,powerful,flash,Homework:,Readthepassage5timesandreciteParagraphs1represent,7.Acomputercandoacalculationinaflash.inaflash=atonce;inaveryshorttime;veryquickly/fastIllbebackinaflash.=Illbebackatonce.=Illbebackinaveryshorttime.,Paraphrasethefollowingsentences:Everyoneknowsatleasttwolanguages.Everyoneknowsnomorethantwolanguages.2.Longlongago,peoplewrotenumbersinmanyways.Inancienttimes,peoplewrotenumbersinmanyways.3.Thesystemconsistsofthenumbersfrom1to9.Thesystemismadeupofthenumbersfrom1to9.4.Thebeadsonthewiresstandsforones,tens,hundredsandthousands.Thebeadsonthewiresrepresents/meansones,tens.hundredsandthousands.,Paraphrasethef